1128512923 has 4 divisors (see below), whose sum is σ = 1187908360. Its totient is φ = 1069117488.

The previous prime is 1128512909. The next prime is 1128512953. The reversal of 1128512923 is 3292158211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3292158211 = 197 ⋅16711463.

It is a cyclic number.

It is not a de Polignac number, because 1128512923 - 2¹³ = 1128504731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128512953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29697690 + ... + 29697727.

It is an arithmetic number, because the mean of its divisors is an integer number (296977090).

Almost surely, 2^1128512923 is an apocalyptic number.

1128512923 is a deficient number, since it is larger than the sum of its proper divisors (59395437).

1128512923 is an equidigital number, since it uses as much as digits as its factorization.

1128512923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59395436.

The product of its digits is 8640, while the sum is 34.

The square root of 1128512923 is about 33593.3464096687. The cubic root of 1128512923 is about 1041.1233310343.

The spelling of 1128512923 in words is "one billion, one hundred twenty-eight million, five hundred twelve thousand, nine hundred twenty-three".